Here's the proper way to delete the Windows.old and $Windows.BT folders: 1  Click Start and type in disk cleanup (no quotes). Wait for the Disk Cleanup utility to show up in the Start menu and click it. 2  A window will appear asking you which hard drive you want to clean up. Choose the C drive (which is default) and click OK.
The A-and B-type HCs are very similar in appearance in the rabbit retina too. Other species may have more than two types of horizontal cell and often these other types are concerned with color coding (see chapter on Horizontal cells by Perlman et al., webvision).
A) cone cells can detect color, but rod cells cannot. B) cone cells are more sensitive than rod cells to light. C) cone cells, but not rod cells, have a visual pigment. D) rod cells are most highly concentrated in the center of the retina. E) rod cells require higher illumination for stimulation than do cone cells.